in this image you can see that the light is coming from the right of the persons face.

 in this image you can see that the light is coming from above the person and infront of them

 in this image you can see that there are two lights facing the person on each side leaving the middle dark

in this image you can see that the light is shining behind the person

Portrait lighting

 With this photo I have used the light at the back of the head which creates a glow infront of the person that makes a good photo. The lighting in this photo looks good because it shows the sitter in a flattering, warm light

 With this photo I have used two cameras at either side and used a peice of polystyrene to reflect the light onto him which lightens the picture up. I like the shadows in this portrait.

 With this photo I have had the person face sideways from the light that creates a darker side to his face to make the person look dark and suspicious. In this portrait the light is too strong this will distort the features.

With this photo I have had the person sit down and have the light flash on his face to create a suddon bright flash on the face.